Fruit juice extractor



Dec. 23, 1952 Filed May 15, 1948 A. B. SMITH FRUIT JUICE EXTRACTOR 2SHEETS-SHEET l .1 46W Md Dec. 23, 1952 A. B. SMITH 2,622,644

FRUIT JUICE EXTRACTOR Filed May 15, 1948 2 SHEETS SHEET 2 W MM-V2 Mlwany of them use a heavy Patented Dec. 23,. 1952 2,622,644- FRUIFIJUICE EXTKAGTOR AjdamfBallantyne Smith, Edmonton, idlberta, CanadaAnnamaria- 15, 1948;, SeriaLNo. 21,343 In Canada February- 18, .1948

1 Claim. (Cl. 146-76) The "object of my invention isft'he provision of amechanism which will extract'orpressthejuice from fruits, raw vegetablesor roots and will separatethe juice from the .pulp or from thepulp andfibre. The mechanism -I have designed accomplishes this object withgreater efiiciency and more speed than do any existing machinesdesigned; for this purpose.

i the various types of r-ruitjuiceextractors presently in use, all havenotable disadvantages.

and unwieldy mechanism. Other types are inefiicient 'in that alargeportion of the juice is not extracted from the fruit or vegetable.The-greaternumber of fruit juice extractors, however, arfe ineflicientin the lack of separation of the=small=bits of pulp 'from thejuiceiwhich isrecovered.

My invention provides a comparatively light machine which may beoperated by hand or by power. The extraction and separation of the juicefrom the pulp and fibre is thorough and complete, with the result thatthe extracted juice is perfectly clear.

The operation of the device may best be understood by reference to thattached drawings in which:

Figure 1 is a side sectional elevation of the device with the locationof the source of power indicated in phantom lines.

Figure 2 is a diagrammatic view of the rotor and four blades revealingthe varying angle of each blade and the varying lengths of differentblades.

Figure 3 is a side view of a blade detached from the assembly.

Figure 4 is an additional view of the blade indicating how it is fittedon the rotor, which is shown in phantom lines.

Figure 5 is a general perspective view of the assembly with the pulpdump detached.

Figure 6 is a perspective view of the pulp dump.

In Figures 1 and 5, l is the hopper through which the whole fruit orvegetable is introduced into the extractor. 2 is the outer casing of theextractor with which is assembled a perforated colander 3. The spacebetween the outer casing 2 and the colander 3 forms a chamber 4.

Rotatably mounted on a horizontal axis and within the casing andcolander assembly is a rotor 5 upon which is mounted a series ofhelically arranged blades 6 and I. It will be noted, particularly inFigures 2 and 4, that every fourth blade I is longer than the threeintervenin blades 6,6.

A mounting plate 8 is firmly secured to the hub of "the motor :9whichenables the extractor to be assembled with the, motor 9 or mountedupon'it.

The rotor 5 isassembled with the t'blades 6: and 1 :and the backing ringI'll, asjshown infFigure 4. The. peculiar shape of the blades '6. andf'lcan be seen from Figure 2 and Figure 3. The locking ring l2 isslippe'dover the closer/H which is'then screwed into the rotor 5., The hubnut13,."is then screwed over vthebackin'gring I 0 and thejresultant unit isthen threaded -onto the motor Spindl extension M. The helical blades '6and '1 are set into the grooves injthe1rotorf5' and 'aresheld in placeby the locking ring by the notch '15. 'ThejhubLnut l3 is flattenedn'on12 which is contained two sides to facilitate tightening with a, wrench.

The outer casing '2 withjthe colander "3 secured to the mounting "plate"8 by means of any suitable clamping device.

In order to produce maximum efficiency in the operation of the blades 6and I, they are so shaped that at the hopper end of the rotor the flatplan of the blade inclines at an angle toward the direction of rotationof the rotor 5 and at the opposite end at any angle away from thedirection of rotation of the rotor 5. This variation in angle isindicated by the angle 16 in Figure 2. In addition the edge of eachblade is suitably ground, to provide a keen cutting edge in thedirection of rotation of the rotor 5.

In operation, the fruit from which the juice is to be extracted isinserted in the feed hopper l. The rotation of the sharpened helicalblades 6 and I cuts the fruit into wafer-thin slices and subjects thewafer-thin slices to centrifigal force to extract most of the juice. Thecontinued rotation of the blades reduces the wafer-thin slices to a wetpulp.

The rotation of the blades 6 and I squeezes the pulped fruit against theholes in the colander 3. The juices are forced through the holes intothe chamber 4 and are drained off through a suitable catch pipe l'l.

Due to the helical shape of the blades 6 and I the pulp itself will movealong the blades and the top of the rotor 5 in a direction away from thehopper l and will eventually be deposited in the pulp dump Hi from whichit can drop into any suitable receptacle.

The fact that every fourth blade 1 extends well past the ends of theremaining blades 6 and the end of the rotor 5 provides a fanning effect,which tends to blow the pulp clear of the rotor and blades and into thepulp dump I8. This ensures a much more complete separation of the pulpfrom the juice than would otherwise be obtained. It also ensures thatthe operation is clean, avoiding the necessity, present in many types offruit juice extractors, of frequent dismantling and cleaning during theoperation due to clogging of the mechanism by the pulp. The actiondescribed is not that of forcing the juice through the holes in thecolander 3 by the blowing action but rather the action of blowing theunwanted pulp clear of the rotor and blades into the pulp dump I8.

After use, the device is easily dismantled for cleaning by undoing theclamps, permitting the pulp dump l8 to be removed from the outer casing2 and the assembly included within the outer casing 2 to be removed fromthe mounting plate 8.

In the example shown an electric motor is fitted The to provide thenecessary motive power.

same device could be fitted with a crank or handle to provide for theapplication-of hand power. Also in the example shown, every fourth bladeis longer than the remaining three. The

proportion of long blades to short may be varied,

depending upon the size of the machine used.

What I claim as my invention is:

A device for separating the juices from fruits, vegetables and rootscomprising a rotor rotatably mounted on a horizontal axis; a series ofhelically arranged blades mounted on the said rotor, the flat plane ofthe said blades inclined at an angle towards the direction of rotationof the said rotor at one end of the said blades and at an angle awayfrom the direction of rotation at the other end of the said blades,every fourth blade of the said blades being longer than the previousthree of the said blades, the longer blades. extending well past one ofthe ends of the said rotor and the shorter blades being substantially ofthe same length as the said rotor; all

an outer casing containing the said assembly and forming a chamberoutside the colander; outlet means for the said chamber; an additionalchamber positioned to enclose the longer blades of the said series ofhelically arranged blades and adapted to discharge material receivedfrom the said longer blades; means for rotating the said rotor assembly.

ADAM BALLANTYNE SMITH.

REFERENCES CITED The following referencesare of record in the file ofthis patent:

UNITED STATES PATENTS

